[ 39.393377][ T27] audit: type=1800 audit(1557355069.748:26): pid=7792 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.423311][ T27] audit: type=1800 audit(1557355069.748:27): pid=7792 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 39.446021][ T27] audit: type=1800 audit(1557355069.748:28): pid=7792 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.158610][ T27] audit: type=1800 audit(1557355070.548:29): pid=7792 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.176' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.751897][ T7948] ------------[ cut here ]------------ [ 65.757401][ T7948] DEBUG_LOCKS_WARN_ON(depth <= 0) [ 65.757471][ T7948] WARNING: CPU: 1 PID: 7948 at kernel/locking/lockdep.c:4052 lock_release+0x667/0xa00 [ 65.772317][ T7948] Kernel panic - not syncing: panic_on_warn set ... [ 65.778909][ T7948] CPU: 1 PID: 7948 Comm: syz-executor561 Not tainted 5.1.0-next-20190508 #3 [ 65.787775][ T7948] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.797834][ T7948] Call Trace: [ 65.801251][ T7948] dump_stack+0x172/0x1f0 [ 65.805573][ T7948] ? lock_release+0x5c0/0xa00 [ 65.810246][ T7948] panic+0x2cb/0x75a [ 65.814217][ T7948] ? __warn_printk+0xf3/0xf3 [ 65.818804][ T7948] ? lock_release+0x667/0xa00 [ 65.823489][ T7948] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.829733][ T7948] ? __warn.cold+0x5/0x47 [ 65.834262][ T7948] ? __warn+0xe8/0x1d0 [ 65.838330][ T7948] ? lock_release+0x667/0xa00 [ 65.843007][ T7948] __warn.cold+0x20/0x47 [ 65.847242][ T7948] ? vprintk_emit+0x1ea/0x700 [ 65.851924][ T7948] ? lock_release+0x667/0xa00 [ 65.856603][ T7948] report_bug+0x263/0x2b0 [ 65.860933][ T7948] do_error_trap+0x11b/0x200 [ 65.865524][ T7948] do_invalid_op+0x37/0x50 [ 65.869929][ T7948] ? lock_release+0x667/0xa00 [ 65.874610][ T7948] invalid_op+0x14/0x20 [ 65.878766][ T7948] RIP: 0010:lock_release+0x667/0xa00 [ 65.884039][ T7948] Code: 0f 85 a0 03 00 00 8b 35 a7 02 09 08 85 f6 75 23 48 c7 c6 e0 57 6b 87 48 c7 c7 80 27 6b 87 4c 89 85 70 ff ff ff e8 37 7c eb ff <0f> 0b 4c 8b 85 70 ff ff ff 4c 89 ea 4c 89 e6 4c 89 c7 e8 52 63 ff [ 65.903914][ T7948] RSP: 0018:ffff888095867730 EFLAGS: 00010082 [ 65.910091][ T7948] RAX: 0000000000000000 RBX: 1ffff11012b0ceec RCX: 0000000000000000 [ 65.918063][ T7948] RDX: 0000000000000000 RSI: ffffffff815b20c6 RDI: ffffed1012b0ced8 [ 65.926038][ T7948] RBP: ffff8880958677e8 R08: ffff88809a5b83c0 R09: fffffbfff1133071 [ 65.934023][ T7948] R10: fffffbfff1133070 R11: ffffffff88998383 R12: ffff888219eeb700 [ 65.942039][ T7948] R13: ffffffff821668ab R14: ffffffff8a45bd40 R15: ffff8880958677c0 [ 65.950150][ T7948] ? nfs_get_client+0xc1b/0x1300 [ 65.955228][ T7948] ? vprintk_func+0x86/0x189 [ 65.959822][ T7948] ? lock_downgrade+0x880/0x880 [ 65.964682][ T7948] ? lock_downgrade+0x880/0x880 [ 65.969776][ T7948] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 65.976015][ T7948] ? refcount_dec_and_lock+0x35/0x90 [ 65.981509][ T7948] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 65.987752][ T7948] _raw_spin_unlock+0x1b/0x50 [ 65.992430][ T7948] nfs_get_client+0xc1b/0x1300 [ 65.997198][ T7948] ? trace_hardirqs_on+0x67/0x230 [ 66.002221][ T7948] nfs_init_server+0x26f/0xea0 [ 66.006990][ T7948] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.013236][ T7948] ? nfs_clone_server+0xa90/0xa90 [ 66.018358][ T7948] nfs_create_server+0x12b/0x6d0 [ 66.023304][ T7948] ? find_held_lock+0x35/0x130 [ 66.028175][ T7948] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 66.034200][ T7948] nfs_try_mount+0x15a/0x910 [ 66.041071][ T7948] ? find_held_lock+0x35/0x130 [ 66.046458][ T7948] ? find_nfs_version+0xc2/0x110 [ 66.051398][ T7948] ? nfs_request_mount.constprop.0+0x620/0x620 [ 66.057558][ T7948] ? lock_downgrade+0x880/0x880 [ 66.062419][ T7948] ? kasan_check_read+0x11/0x20 [ 66.067286][ T7948] ? do_raw_spin_unlock+0x57/0x270 [ 66.072574][ T7948] ? _raw_spin_unlock+0x2d/0x50 [ 66.077435][ T7948] ? find_nfs_version+0xe1/0x110 [ 66.082496][ T7948] nfs_fs_mount+0x184a/0x2690 [ 66.087171][ T7948] ? nfs_remount+0x1940/0x1940 [ 66.091939][ T7948] ? rcu_read_lock_sched_held+0x110/0x130 [ 66.097782][ T7948] ? nfs_clone_super+0x420/0x420 [ 66.102727][ T7948] ? nfs_parse_mount_options+0x2280/0x2280 [ 66.108551][ T7948] ? nfs_remount+0x1940/0x1940 [ 66.113464][ T7948] legacy_get_tree+0x10a/0x220 [ 66.118251][ T7948] ? legacy_parse_monolithic+0x11f/0x180 [ 66.123887][ T7948] vfs_get_tree+0x93/0x3a0 [ 66.128316][ T7948] do_mount+0x138c/0x1c00 [ 66.132818][ T7948] ? copy_mount_string+0x40/0x40 [ 66.137767][ T7948] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.144128][ T7948] ? copy_mount_options+0x280/0x3a0 [ 66.149440][ T7948] ksys_mount+0xdb/0x150 [ 66.153696][ T7948] __x64_sys_mount+0xbe/0x150 [ 66.158381][ T7948] do_syscall_64+0x103/0x670 [ 66.163066][ T7948] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.168961][ T7948] RIP: 0033:0x4467d9 [ 66.172858][ T7948] Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 66.192724][ T7948] RSP: 002b:00007f54c53e0db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 66.201259][ T7948] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004467d9 [ 66.215965][ T7948] RDX: 0000000020fb5ffc RSI: 0000000020343ff8 RDI: 0000000000000000 [ 66.223943][ T7948] RBP: 00000000006dbc30 R08: 000000002000a000 R09: 0000000000000000 [ 66.231990][ T7948] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 66.239969][ T7948] R13: 00007ffe22037e2f R14: 00007f54c53e19c0 R15: 20c49ba5e353f7cf [ 66.248766][ T7948] Kernel Offset: disabled [ 66.253151][ T7948] Rebooting in 86400 seconds..